I stayed 2 months in Alex's condo in front of Iconsiam and it was absolutely perfect. The location is great, if you like quietness but also being close to pretty much everything interesting in bkk. It's about 10 minutes away from Chinatown, or the malls area (MBK, Siam Paragon, Central World,etc).
There's a free boat shuttle just a few minutes away by foot to Iconsiam, and plenty of street restaurants all around.
The 7/11 rightdown the building is super convenient too!
The condo is comfortable with all 5he facilities you need for short or long stays,the view is stunning and the building super secure and modern.
Alex is super friendly and proactive, super smooth communication all along.
The only "negative" thing I would add is that the furnishment overall is a bit old and used but it's ok compared to all the advantages to stay there.